When sbt.version in build.properties has trailing whitespace,
sbt incorrectly reports a version mismatch even after reboot.
This fix trims the property value in all places where sbt.version
is read from build.properties:
- Main.scala (version mismatch warning)
- MainLoop.scala (clean command version detection)
- ScriptedTests.scala (test compatibility check)
Fixes#8103
**Problem**
During sbt 1.x we created scripted-sbt-redux for package name change.
**Solution**
We can move the module back to scripted-sbt, which simplifies things.